<?php
class CartaSection extends AppModel {
    public $belongsTo = array(

        'Carta' => array(
            'className'    => 'Carta',
            'foreignKey'   => 'id_carta',
        ),
        'Section' => array(
            'className'    => 'Section',
            'foreignKey'   => 'id_seccion'
        )
    );
}